1. Alcohol: Alcohol can cause diarrhea, vomiting, loss of body coordination, and damage to the central nervous system, leading to coma or even death in severe cases.

2. Onions, garlic, leeks: These things are very bad for the ghost mastiff's stomach, and will also damage the ghost mastiff's own red blood cells.

3. Chicken bones, duck bones: once bitten, it will be the same as A needle may get stuck in the throat and scratch the mastiff's throat.

4. Salt: diarrhea in mild cases, hair loss, body odor, skin diseases, and kidney failure and depression in severe cases.